I dont understand the problem either but when you only want to rename the log files, you can use the cleanup() function at the end of the test, and rename them with file_copy. Look this up in the manual.

Thank you. That is what I want to to.

Another request:

I sometimes backtest multiple zorro in parallel. Problem is testtrade.csv file generated in the log folder. Multiple zorro overwrite same testtrade.csv file.
I don't know what is zorro developers intention to fix the file name, but I think it would better to follow script name.

AFAIK, the intention is that the log of trades is global, not for a particular file. All instances write into it.